6. Turn off the power switch on the new unit.
7. Check the fault LED to locate the failed power supply. If a fault is detected, the
amber fault LED is lit.
8. Make sure that the service action allowed LED is lit. Do not remove the power
supply if the LED is off. For more information about the service action allowed
LED, see “Service action allowed LED” on page 63.
Chapter 5. Replacing components 81